Fluid self-circulation system with controllable built-in valve

Abstract

The invention discloses a fluid self-circulation system with a controllable built-in valve. The fluid self-circulation system is mainly composed of an equivalent pressure cabin, the controllable built-in valve, a built-in through-flow pipe, an outboard valve, a backflow guide pipe and the like. The outboard valve is an independent one-way valve or an independent switch valve or a combination of the two valves. A controllable built-in valve in the equivalent pressure cabin is connected with a built-in through-flow pipe, and the built-in through-flow pipe is connected with the equivalent pressure cabin or connected with a backflow guide pipe outside the equivalent pressure cabin. The controllable built-in valve not only can be used independently, but also can be used in combination with other devices.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid self-circulation, in particular to a gaseous fluid or gas-liquid fluid self-circulation system. The gaseous fluid self-circulation system refers to a pressure cabin containing only gaseous fluid, and the so-called gaseous fluid can be a monomolecular gas or a multicomolecular gas. The gas-liquid fluid self-circulation system contains both gaseous fluid and liquid fluid in the pressure cabin, and each maintains its original physical characteristics. Therefore, the gas-liquid fluid should not be understood as a mixed fluid. BACKGROUND

[0002] The gaseous fluid has amazing properties: no natural interface, the highest flowability, the highest compressibility, and the highest expansibility in nature.

[0003] The liquid fluid also has amazing properties: extremely soft and incompressible, and the only substance in nature with only one natural interface. Moreover, this natural interface is naturally horizontal.

[0004] In a natural state, the flow rule of gaseous fluid flows to a low pressure direction, and the flow rule of liquid fluid is subject to the earth's gravity. In the prior art, fluid circulation is usually discharged to the normal environment and then reused. If it is a pressure fluid, it is basically a simple discharge, which is a huge waste. Even the supercharging device of a car can only recycle a small part of the pressure gas for recycling.

[0005] It is hoped that a suitable fluid circulation system can be developed to serve mankind by utilizing the properties of these substances. SUMMARY

[0006] The present application provides a fluid self-circulation system with a controllable built-in valve to solve the problem that in the prior art, fluid circulation is usually discharged to the normal environment and then reused. If it is a pressure fluid, it is basically a simple discharge, which is a huge waste. Even the supercharging device of a car can only recycle a small part of the pressure gas for recycling.

[0007] In one aspect, the present application provides a fluid self-circulation system with a controllable built-in valve, mainly composed of an equivalent pressure cabin, an external valve, a controllable built-in valve, a built-in flow pipe, an external valve, a return conduit, etc. The controllable built-in valve in the pressure cabin is connected with the built-in flow pipe, the built-in flow pipe is connected with the return conduit (the built-in flow pipe can also be integrated with the return conduit), and the return conduit is connected with the pressure cabin. The outlet of the pressure cabin is connected with the external valve, and the external valve is connected with the return conduit. The external valve is an independent check valve or an independent on-off valve, or both, or a combination of check valve and on-off valve functions.

[0008] The so-called equivalent pressure cabin means that the pressure at each point in the pressure cabin is equivalent, regardless of the level or stability of the pressure.

[0009] The working medium of the fluid self-circulation system with controllable built-in valves can be gaseous fluid or gas-liquid fluid. Although the pressure in the equivalent pressure cabin can be less than, equal to, or greater than atmospheric pressure, the working pressure in the pressure cabin of the fluid self-circulation system should be greater than atmospheric pressure. The shape of the equivalent pressure cabin can be spherical or cylindrical, or other suitable shapes.

[0010] According to the fluid self-circulation system with controllable built-in valves provided by the present application, if the fluid in the pressure cabin is a gas-liquid fluid, the height of the liquid fluid should completely submerge the fluid outlet provided on the pressure cabin.

[0011] According to the fluid self-circulation system with controllable built-in valves provided by the present application, the pressure cabin can be provided with a plurality of fluid outlets, which are respectively connected with the same number of return conduits.

[0012] The so-called controllable built-in valve mainly includes devices that can block or pass fluid flow, such as controllable one-way valves and on-off valves installed in the pressure cabin; but it also includes other devices installed in the pressure cabin that also have the function of blocking or passing fluid flow and are controllable. In other words, most controllable built-in valves have valve cores, and a small number of controllable built-in valves can also have no valve cores.

[0013] Therefore, all devices installed in the pressure cabin that are connected with the built-in flow pipe and have the function of blocking or passing fluid flow and are controllable, whether they have valve cores or not, are controllable built-in valves, which can be used independently, simultaneously, or in combination with other devices.

[0014] Scope of controllable built-in valves.

[0015] Generally, other controllable devices should be described separately from controllable one-way valves and on-off valves, because the valve body of a traditional valve has at least a valve core, while other controllable devices may not have a valve core.

[0016] Even so, controllable built-in valves with valve cores should still be described in accordance with the requirements of the fluid self-circulation system, and it can be seen that controllable built-in valves in an equivalent environment are indeed different from the requirements of one-way valves in traditional fluid circulation systems.

[0017] The valve core of a controllable built-in valve can perform various opening and closing movements, including straight-line movement in which the direction of the movement trajectory of the valve core is parallel or coincides with the direction of the movement trajectory of the fluid in the built-in flow pipe, as shown in Figure Four Figure Four-1 ​The direction of the movement trajectory of the valve core is perpendicular to the direction of the movement trajectory of the fluid in the built-in flow pipe, and the valve core moves in a transverse side-cutting manner, such as Figure Four-2 The direction of the movement trajectory of the valve core is deflected by a certain angle from the direction of the movement trajectory of the fluid in the built-in flow pipe, and the valve core moves in an oblique side-cutting manner, such as Figure Four-3 The direction of the movement trajectory of the valve core is synchronously deflected from the direction of the movement trajectory of the fluid in the built-in flow pipe, and the valve core moves in a straight line or a transverse side-cutting manner.

[0018] The straight-line movement and the transverse side-cutting movement of the valve core are commonly used movement modes of the valve core of the controllable built-in valve.

[0019] The valve core moves in a straight line, and there is basically no change mode. The movement route (direction, trajectory) of the valve core is parallel or coincides with the flow direction of the fluid in the built-in flow pipe, and the structure is simple, but the normal resistance caused by the equivalent action of the pressure fluid is relatively large.

[0020] The valve core moves in a transverse side-cutting manner, and there are more change modes. There is only a transverse side-cutting of the valve core relative to the flow direction of the fluid in the built-in flow pipe, and there is also a transverse side-cutting of the valve body relative to the flow direction of the fluid in the built-in flow pipe. In this way, the normal resistance caused by the equivalent action of the pressure fluid will be relatively small.

[0021] The valve core of the controllable built-in valve is usually a whole structure, but the valve core can also be divided into several petal-like structures (such as aperture structures, pupil structures or similar structures). However, the number of divisions should be at least two petals or more.

[0022] The movement mode of the valve core divided into several petal-like structures belongs to the transverse side-cutting movement.

[0023] It should be noted that most controllable built-in valves are composed of two parts, namely "valve" and "control device". Therefore, the valve core part of the controllable built-in valve must be arranged or installed in the pressure chamber. As for the control part, it can be arranged or installed in the pressure chamber or outside the pressure chamber.

[0024] In addition to most solid substances, the "valve core" of the controllable built-in valve can also use liquid or semi-liquid substances, that is, the "valve port" is immersed in the liquid substance. For example, the "valve port" is lifted to separate from the liquid surface to be "opened". Conversely, the "valve port" is lowered to be immersed in the liquid surface to be "closed".

[0025] According to the fluid self-circulation system with a controllable built-in valve provided by the present application, the flow area of the controllable built-in valve can be less than or equal to, or greater than the flow area of the built-in flow pipe.

[0026] The control form of the controllable built-in valve can be manual control or electric control, or other non-manual control.

[0027] Unlike the self-opening and closing one-way valve, the controllable built-in valve 2 must be opened and closed according to the control command.

[0028] According to the fluid self-circulation system with a controllable built-in valve provided by the application, the backflow conduit can be connected with one or more loads and other devices.

[0029] In another aspect, the application also provides a fluid self-circulation system with a controllable built-in valve, in which fluid can only flow through the fluid outlet, the backflow conduit, and then enter the pressure cabin through the built-in flow pipe and / or the controllable built-in valve, and backflow of the fluid is not allowed.

[0030] The fluid self-circulation system with a controllable built-in valve provided by the application has the following characteristics: Even if the fluid is subjected to pressure or resistance from both a certain direction and a specified direction, the fluid is only allowed to flow preferentially in the specified direction, and reverse flow of the fluid is not allowed. A venturi or a venturi-like device can be arranged at the connection between the built-in flow pipe and the controllable built-in valve, so as to increase the flow rate of the fluid in the built-in flow pipe before the fluid flows out of the controllable built-in valve, and to stabilize the flow state.

[0031] In order to improve efficiency, the fluid cabin 1-7 can be arranged to store more fluid, and the fluid flowing out of the fluid outlet first enters the fluid cabin through the backflow conduit and then flows into the built-in flow pipe, so as to increase the gravitational potential energy of the fluid flowing back to the pressure cabin, and to make the fluid more easily enter the pressure cabin. The fluid cabin connected with the built-in flow pipe is actually an expansion of the backflow conduit.

[0032] The fluid cabin 1-7 is a relatively large container, which is usually spherical or cylindrical and can withstand a certain pressure. If a one-way valve is arranged at the connection between the fluid cabin and the backflow conduit 4 and / or the built-in flow pipe 4-1, it will become a large stable pressure valve or stable pressure cabin. The liquid fluid in the fluid cabin 1-7 can be filled or not filled. If the fluid cabin 1-7 is not filled with liquid fluid, the gaseous fluid remaining in the unfilled space will be naturally pressurized (a small amount of gaseous fluid with a pressure higher than atmospheric pressure can also be injected), so that it becomes a stable pressure and pressurized cabin. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Figure 1 is a structural diagram of a fluid self-circulation system with built-in flow pipe installed from top to bottom provided by the present application; Figure 1-1 is a structural diagram of a fluid self-circulation system with built-in flow pipe installed from top to bottom and having a fluid tank; Figure 2 is a structural diagram of a fluid self-circulation system with built-in flow pipe installed from bottom to top; Figure 2-1 is a structural diagram of a fluid self-circulation system with built-in flow pipe installed from top to bottom and having a fluid tank; Figure 3 is a structural diagram of a fluid self-circulation system with built-in flow pipe installed from top to bottom and having a fluid tank; Figure 3-1 is a structural diagram of a fluid self-circulation system with built-in flow pipe installed from top to bottom and having a fluid tank; Figure 4 is a schematic diagram of fluid flow trajectory and spool movement trajectory being parallel or coinciding; Figure 4-1 is a schematic diagram of fluid flow trajectory and spool movement trajectory being perpendicular to each other; Figure 4-2 is a schematic diagram of fluid flow trajectory and spool movement trajectory being deflected to each other; Figure 4-3 is a schematic diagram of fluid flow trajectory and spool movement trajectory being synchronously deflected; Figure 5 is a structural diagram of an equivalent pressure tank.

[0035] Reference signs: Pressure tank 1, gaseous pressure fluid 1-1, liquid fluid 1-11, pressure input device 1-2, safety device (pressure relief) 1-3, liquid fluid supplement port 1-4, fluid outlet 1-5, tank valve 1-6, fluid tank 1-7, controllable built-in valve 2, pressure stabilizing device or one-way pass-stop-reverse device 3, backflow conduit 4, built-in flow pipe 4-1, load 5, flow valve 6. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0037] The fluid self-circulation system with controllable built-in valve of the present application will be described below in conjunction with the drawings. For the convenience of understanding, the gas-liquid fluid self-circulation system is taken as an example.

[0038] Figure 1is one of the structural diagrams provided by the present application.

[0039] As shown in Figure 1 , P is the pressure value of the pressure cabin 1, P1 is the pressure measurement point of the fluid outlet 1-5 of the pressure cabin 1, P2 is the pressure measurement point of the outlet of the built-in valve 2, and P3 is the pressure measurement point of the connection between the built-in valve 2 and the reflux conduit 4. These pressure measurement points are not the actual structure of the fluid circulation system, but are only labels for easy understanding.

[0040] The pressure cabin 1 is one of the most important core components in the fluid self-circulation system.

[0041] The pressure cabin 1 is a hollow object with a large internal space. The pressure cabin needs to withstand high pressure, so it is usually made of solid materials. The shape of the pressure cabin 1 can be spherical or cylindrical, or other cuboids with length, width, and height. After all channels including controllable built-in valves, external valves, etc. are closed, the internal pressure of the pressure cabin is equivalent at any point, so it is called an equivalent pressure cabin. The built-in flow conduit 4-1 is installed in the pressure cabin 1.

[0042] Because the pressure of each point in the internal environment of the pressure cabin is equivalent, it is extremely difficult for fluid to enter the pressure cabin due to the internal pressure of the pressure cabin. The built-in flow conduit 4-1 is installed in the pressure cabin 1, and the pipe wall of the built-in flow conduit blocks the internal pressure of the pressure cabin for the fluid, which is equivalent to opening a dedicated channel for the fluid to enter the pressure cabin, and does not allow fluid backflow. The pressure cabin 1 is also processed with a fluid outlet 1-5 below.

[0043] The external valve 1-6 is connected with the outlet 1-5 of the pressure cabin 1 and the reflux conduit 4 and can make the pressure cabin inside and outside conductive or closed. The so-called external valve refers to the general term for one-way valves, overflow valves, on-off valves, etc. outside the pressure cabin. Because its installation location and environment are different from the built-in valve, it is distinguished by being inside or outside the pressure cabin.

[0044] The reflux conduit 4 is a relatively slender pipe, which is a channel for fluid outside the pressure cabin. One end of the reflux conduit 4 is connected with the built-in flow conduit 4-1, the other end is connected with the external valve 1-6, and it can also be connected with the flow valve 6, the pressure stabilizing device or the one-way flow and reverse stopping device (it can also be connected with both the pressure stabilizing device and the one-way flow and reverse stopping device), the load 5, etc. In addition, multiple loads 5 can also be connected on the reflux conduit 4. It should be noted that the reflux conduit 4 can also directly extend into the pressure cabin to become the built-in flow conduit 4-1. The difference between the built-in flow conduit 4-1 and the reflux conduit 4 is that the built-in flow conduit 4-1 is arranged inside the pressure cabin, and the reflux conduit 4 is arranged outside the pressure cabin. Separating the identification and explanation can make it easier to understand the working principle of the entire self-circulation system.

[0045] The pressure tank 1 is also provided with a pressure input device 1-2, a safety device (pressure relief) 1-3, a liquid fluid supplement port 1-4, etc. The pressure tank 1 can be filled with different fluids. If it is a gaseous circulation system, only the gaseous fluid 1-1 is needed. If it is a gas-liquid circulation system, both the gaseous fluid 1-1 and the liquid fluid 1-11 are needed. The gaseous fluid 1-1 is a pressure fluid with high flowability, high compressibility and high expansibility. The liquid fluid 1-11 is a fluid that can flow quickly under sufficient pressure.

[0046] If a gas-liquid fluid is used, the height (or depth) of the liquid fluid 1-11 in the pressure tank 1 must completely submerge the fluid outlet 1-5 (such as Figure 1 As shown, the liquid fluid 1-11 is marked with two arrows. The upper arrow points to the surface of the liquid fluid, which can also be understood as the interface or action surface between the liquid fluid and the gaseous fluid 1-1. The lower arrow points to the liquid itself of the liquid fluid 1-11, which ensures that the gaseous fluid 1-1 cannot enter the reflux conduit 4 from the fluid outlet 1-5. It should be noted that the outlet 1-5 is the outlet of the pressure tank 1.

[0047] The gaseous fluid 1-1 in the pressure tank 1 is usually input by the pressure input device 1-2, such as an air compressor, a gas tank or the like.

[0048] Taking the gas-liquid fluid circulation system as an example, when the pressure of the gaseous fluid 1-1 in the pressure tank 1 reaches a set pressure value, the gaseous fluid 1-1 tries to occupy more limited space in the pressure tank 1, which will force the liquid fluid 1-11 to flow from the fluid outlet 1-5 of the pressure tank 1 into the reflux conduit 4. The reflux conduit 4 then inputs the liquid fluid 1-11 into the built-in flow pipe 4-1, opens the controllable built-in valve 2, so that the liquid fluid 1-11 can reflow into the pressure tank 1.

[0049] The pressure tank 1 usually only needs to be processed with a fluid outlet 1-5 at a lower position to be connected with the reflux conduit 4. If necessary, the pressure tank 1 can also be processed with several fluid outlets 1-5, which are connected with the reflux conduit 4. When the pressure of the gaseous fluid 1-1 in the pressure tank 1 reaches a set pressure value, the liquid fluid 1-11 is forced to flow from each fluid outlet 1-5 into the corresponding reflux conduit 4, and the reflux conduit 4 then delivers the liquid fluid 1-11 to the built-in flow pipe 4-1. In addition to being connected with multiple reflux conduits 4 respectively, the several fluid outlets 1-5 of the pressure tank 1 can also be connected with a reflux conduit 4 with a larger inner diameter. When the pressure of the gaseous fluid 1-1 in the pressure tank 1 reaches a set value, the liquid fluid 1-11 is forced to flow from the fluid outlets 1-5 into the reflux conduit 4 with a larger inner diameter, and then input into the built-in flow pipe 4-1 in the pressure tank through the reflux conduit 4 with a larger inner diameter. Opening the controllable built-in valve 2 can make the liquid fluid 1-11 reflow into the pressure tank 1.

[0050] The pressure tank 1 is usually also equipped with a pressure input device 1-2, a safety device (pressure relief) 1-3, a liquid fluid supplement port 1-4, a flow valve 6, and other accessories.

[0051] The controllable built-in valve 2 is one of the most important core components in the fluid circulation system.

[0052] The pressure at each point in the pressure tank is equal, and it is usually difficult for the fluid to return to the pressure tank by itself. By placing the built-in flow pipe 4-1 inside the pressure tank, the fluid has actually entered the pressure tank, and it can obviously flow out more easily from the controllable built-in valve and fall into the liquid fluid below. The controllable built-in valve 2 usually has good results if it is used in combination with a pressure stabilizing device or a one-way flow and reverse flow stopping device connected to the backflow conduit. The one-way flow and reverse flow stopping device is a device that only allows fluid to flow in one direction and cannot flow in the opposite direction. The one-way flow and reverse flow stopping device can be installed outside the pressure tank, inside the pressure tank, or both inside and outside the pressure tank.

[0053] There are usually three ways to install the controllable built-in valve 2: it can be installed from top to bottom, with the built-in flow pipe 4-1 extending downward from the top or above the pressure tank, and the outlet of the controllable built-in valve usually pointing downward, or in other directions; it can be installed from bottom to top, with the built-in flow pipe 4-1 extending upward from the bottom or below the pressure tank, and the outlet of the controllable built-in valve usually pointing upward, or in other directions; or it can be installed horizontally, with the built-in flow pipe 4-1 extending horizontally from the side wall of the pressure tank, and the outlet of the controllable built-in valve usually pointing towards the side wall of the pressure tank, or in other directions.

[0054] The three installation methods are common methods, but there are a few exceptions. In some cases, such as when the built-in flow pipe 4-1 extends upward from the bottom or below the pressure tank, a throttle hole can be used instead of a controllable built-in valve. The throttle hole is a port in the built-in flow pipe 4-1 that has a reduced flow area (or not reduced). By using the throttle hole and the properties of the liquid fluid interface, the same spatial separation of gaseous pressure fluid and liquid fluid can be achieved, preventing them from "exchanging positions". This structure that can also prevent gas and liquid from "exchanging positions" can be referred to as a throttle hole. Corresponding to the throttle hole, a one-way valve can be connected to the built-in flow pipe 4-1, or it can not be connected.

[0055] The height of the throttle hole can be slightly submerged below the liquid surface of the liquid fluid, or slightly above the liquid surface. By using the throttle hole, the controllable built-in valve can be omitted, reducing costs.

[0056] In view of the fact that the pressure chamber is an equivalent environment, only using gaseous fluid, the outlet of the controllable built-in valve 2 should be as close as possible to the inner surface of the pressure chamber. The outlet of the controllable built-in valve should be as close as possible to the inner surface of the pressure chamber, which should improve the efficiency of the fluid backflow to the pressure chamber. The same is true for using gas-liquid fluid.

[0057] When using gas-liquid fluid circulation and installing the controllable built-in valve from top to bottom, the outlet of the controllable built-in valve 2 should be downward and as close as possible to the surface of the liquid fluid. When installing the controllable built-in valve from bottom to top, the outlet of the controllable built-in valve 2 is upward and as close as possible to the upper surface of the pressure chamber. When installing the controllable built-in valve in a transverse direction, i.e. horizontally, the outlet of the controllable built-in valve 2 is transversely arranged and as close as possible to the surface of the side wall of the pressure chamber.

[0058] The outlet of the controllable built-in valve 2 should be as close as possible to the inner surface of the pressure chamber or the surface of the liquid fluid, because the closer the outlet of the controllable built-in valve is to the inner surface of the pressure chamber or the surface of the liquid fluid, the smaller the interference of the gaseous fluid in the pressure chamber with the fluid flowing out of the outlet of the controllable built-in valve 2, and the fluid column flowing out of the outlet of the controllable built-in valve 2 itself also has a certain impact, which helps to push away the surrounding gaseous fluid and prevent the gaseous fluid from flowing back into the built-in flow pipe 4-1.

[0059] Specifically, regardless of the upward or downward installation or transverse installation of the controllable built-in valve 2, the maximum distance between the outlet of the controllable built-in valve and the inner surface of the pressure chamber or the surface of the liquid fluid is usually not more than 5 times the diameter of the outlet of the controllable built-in valve. For example, when the outlet diameter of the controllable built-in valve is 10 millimeters (mm), the maximum distance between the outlet of the controllable built-in valve and the inner surface of the pressure chamber or the surface of the liquid fluid is not more than 50 millimeters (10 mm x 5); for another example, when the outlet diameter of the controllable built-in valve is 5 millimeters, the maximum distance between the outlet of the controllable built-in valve 2 and the inner surface of the pressure chamber or the surface of the liquid fluid is not more than 25 millimeters (5 mm x 5).

[0060] The pressure stabilizing device 3 is a device that can stabilize the pressure of the circulation system and even can increase the pressure of the circulation system. The pressure stabilizing device is connected with the backflow conduit 4, and can be connected with the backflow conduit outside the pressure chamber 1 or connected with the built-in flow pipe 4-1 inside the pressure chamber.

[0061] The pressure stabilizing device 3 has several different control forms such as mechanical control, motor control or fluid control.

[0062] The fluid-controlled pressure stabilizing device 3 can provide self-stabilizing pressure requirements. The working inner cavity thereof is a fluid passage, and at least one one-way valve is installed to allow fluid to flow out from the outlet 1-5 of the pressure chamber and flow to the controllable built-in valve, and not to allow backflow. If multiple one-way valves are installed, the pressure stabilizing effect will be better.

[0063] Working principle The gas-liquid fluid circulation principle is more complex than the gaseous fluid circulation principle, and thus the gas-liquid fluid circulation principle is taken as the basis for elaboration.

[0064] A certain amount of gaseous fluid 1-1 and liquid fluid 1-11 are respectively input into the pressure tank 1. Due to the effect of density and gravity, the liquid fluid 1-11 is always below the gaseous fluid 1-1. The height of the liquid fluid must always be submerged in the fluid outlet 1-5, so as to ensure that the gaseous fluid 1-1 in the pressure tank 1 cannot escape from the pressure tank 1 through the fluid outlet 1-5 in any state, and to ensure that the gaseous fluid cannot enter the reflux conduit 4 at all times, and to always maintain a constant state and quantity. The so-called constant state is that the gaseous fluid in the pressure tank 1 always has a set constant pressure; and the so-called constant quantity is that the spatial volume of the gaseous fluid in the pressure tank is always kept unchanged.

[0065] The upper surface of the liquid fluid 1-11 is a natural self-leveling surface, that is, it naturally has a horizontal interface. The gaseous fluid 1-1 in the pressure tank 1 will uniformly cover the upper surface of the liquid fluid 1-11, so that the lower surface of the gaseous fluid 1-1 will be passively formed into a horizontal interface. Therefore, the upper surface of the liquid fluid 1-11 bears the average pressure in the pressure tank 1.

[0066] The liquid fluid 1-11 can usually easily flow from the fluid outlet 1-5 of the pressure tank 1 to the reflux conduit 4. However, because the gaseous fluid 1-1 in the pressure tank 1 has sufficient pressure, it is quite difficult for the liquid fluid 1-11 to re-enter the pressure tank 1.

[0067] From Pascal's theorem, the fluid pressure in a closed container will uniformly act on each point, so the gaseous fluid 1-1 in the pressure tank 1 that has reached a set pressure value will also uniformly act on each point. However, the uniform action on each point here mainly refers to the outlet of the built-in valve 2 and the fluid outlet 1-5 of the pressure tank 1.

[0068] At this time, the pressure value P exerted by the gaseous fluid 1-1 on the surface of the liquid fluid 1-11 is completely equal to the pressure value at each point or any point in the pressure tank 1 (the pressure measurement points P1, P2 are equivalent). As for the measurement point P3 at the connection between the controllable built-in valve 2 and the reflux conduit, it can be equal to or not equal to the pressure value P in the pressure tank 1, the measurement points P1, P2. Here, "equal" or "not equal" is crucial to the "open" or "closed" state of the tank valve 1-6.

[0069] If the main switch valve 1-6 is in the "closed" state, the pressure tank 1 and the controllable built-in valve 2 and the reflux conduit are not connected, and the pressure value of the measurement point P3 is less than the pressure value of the measurement points P1, P2 in the pressure tank 1.

[0070] If the main switch valve 1-6 is in the "open" state at this time, there are two possibilities, 1, the controllable built-in valve 2 outlet is still not opened, then the pressure value of the measurement point P3 should be equal to the pressure value of the measurement points P1, P2 in the pressure chamber 1; 2, the controllable built-in valve 2 outlet is opened, and the liquid fluid 1-11 flows out from the controllable built-in valve 2 outlet, then the pressure value of the measurement point P3 should be less than the pressure value of the measurement points P1, P2 in the pressure chamber 1, and with the continuous or even increasing flow rate of the liquid fluid 1-11, according to Bernoulli's principle, the difference between the pressure value of the measurement point P3 and the pressure value of the measurement points P1, P2 is greater.

[0071] As common sense knows, if the pressure of the measurement point P3 is equal to or less than the pressure of the measurement points P1, P2, the liquid fluid 1-11 may not be able to break through the barrier of the gaseous fluid 1-1 and flow back to the pressure chamber 1, and if the pressure of the measurement point P3 is greater than the pressure of the measurement points P1, P2, the liquid fluid 1-11 should be able to break through the barrier of the gaseous fluid 1-1 and flow back to the pressure chamber 1.

[0072] In fact, as soon as the main switch valve 1-6 is opened, a channel is immediately formed between the pressure chamber 1 and the controllable built-in valve 2 and the backflow conduit, and the gaseous fluid 1-1 will immediately flow to the controllable built-in valve 2, the built-in through pipe 4-1, and the backflow conduit 4, trying to break through the "defense" of the controllable built-in valve 2 and flow back to the backflow conduit 4, and the liquid fluid 1-11 originally filled in the backflow conduit 4 will also immediately flow downward at the same time. Of course, this is only a "tendency" of the two at the moment when the main switch valve 1-6 is opened.

[0073] Suppose that the gaseous fluid 1-1 and the liquid fluid 1-11 are personified, the gaseous fluid 1-1 most wants to exchange positions with the liquid fluid 1-11 and enter the controllable built-in valve 2, the built-in through pipe 4-1, and the backflow conduit 4, and the liquid fluid 1-11 in the built-in through pipe 4-1 wants to break through the barrier of the gaseous fluid 1-1 and enter the pressure chamber 1.

[0074] Once the pressure of the gaseous fluid 1-1 in the pressure chamber 1 is raised and has sufficient pressure, the liquid fluid 1-11 will have to flow from the fluid outlet 1-5 of the pressure chamber 1 to the controllable built-in valve 2 through the backflow conduit 4.

[0075] In addition, the liquid fluid 1-11 also has another inherent advantage: the density of the soft liquid fluid 1-11 is much greater than that of the gaseous fluid 1-1, and the density of the two is different by hundreds of times under the same volume, which is too much difference. If the "wall attachment" effect and the interface "tension" effect of the liquid fluid 1-11 can be excluded, the gaseous fluid 1-1 cannot prevent the falling of the liquid fluid 1-11 affected by the acceleration of gravity. In other words, once the gaseous fluid 1-1 with very small density has to give way to the liquid fluid 1-11 with very large density and fall under the acceleration of gravity, the gaseous fluid 1-1 in the pressure tank 1 cannot resist the downward flow of the liquid fluid 1-11 in the one-way flow and reverse return device 2.

[0076] And the flow continuity of the liquid fluid 1-11 can prevent the position exchange between the reverse gaseous fluid 1-1 and the forward liquid fluid 1-11.

[0077] As long as the position exchange between the reverse gaseous fluid 1-1 and the forward liquid fluid 1-11 is ensured, the circulation of the liquid fluid 1-11 from the pressure tank 1 to the return conduit 4 to the built-in valve 2 and then back to the pressure tank 1 is possible.

[0078] The gaseous fluid 1-1 in the pressure tank 1 will be compressed due to the continuous inflow of the liquid fluid 1-11 through the one-way flow and reverse return device 2, so the pressure value P in the pressure tank 1 increases, and only the liquid fluid continues to flow from the fluid outlet 1-5 to the return conduit 4 to make the volume of the gaseous fluid 1-1 in the pressure tank 1 remain constant, the pressure remains constant, and the total pressure recovers balance. The liquid fluid 1-11 flowing from the fluid outlet 1-5 to the return conduit 4 will re-enter the controllable built-in valve 2 under the pressure of the gaseous fluid 1-1 and then flow downward into the pressure tank 1. Thus, the circulation is completed.

[0079] Figure One As shown, a certain amount of gas-liquid fluid is injected into the pressure tank. The density of the gaseous pressure fluid is much smaller than that of the liquid fluid, so the gas-liquid fluid is automatically divided into two parts, the gaseous pressure fluid occupies the upper part of the pressure tank, and the liquid fluid accumulates in the lower part of the pressure tank, and the liquid fluid automatically forms a horizontal interface. This interface is also the interface of the gas-liquid fluid. The built-in flow pipe 4-1 and the return pipe are filled with liquid fluid, and the gaseous fluid in the built-in flow pipe 4-1 and the return pipe is exhausted as much as possible.

[0080] Continue to add gaseous or liquid fluid, so that the gas and liquid fluid become pressure fluid. Due to the controllable built-in valve, the liquid fluid will not flow out of the controllable built-in valve.

[0081] When the injection amount of the gas-liquid fluid reaches the set requirement, the pressure at each point in the pressure tank is equivalent. Without considering the gravity of the liquid fluid, the pressure "value" of the three measurement points P1, P2 and P3 should be equal to the pressure "value" of "P".

[0082] Therefore, the controllable built-in valve is not opened at this time, and the fluid pressure, although having a substantially equal pressure value, cannot flow. However, if the tank valve is installed with a one-way valve and a switch valve, the liquid fluid in the built-in flow pipe 4-1 and the return pipe from the tank valve to the controllable built-in valve actually has no injection pressure. That is, if the tank valve is installed with a switch valve, the switch valve should be opened first, so that the liquid fluid in the built-in flow pipe 4-1 and the return pipe has a pressure "value" equal to "P" immediately, and then the controllable built-in valve is opened.

[0083] Example 1 A communication pipe with three branches is taken, and the horizontal main pipe can have a pipe diameter larger than or the same as that of each branch. The height and pipe diameter of each branch are the same, and the pipe distance between the middle branch B and the branch A and the branch C is the same. Each branch is in communication with the atmosphere.

[0084] Water is injected from any branch, and it can be seen that the water height in each branch is the same, indicating that the pressure in each branch is the same, which is consistent with Pascal's theorem.

[0085] Example 2 The upper end of the branch C of the communication pipe in the preceding clause is completely closed. Water is injected from the branch B, and it can be seen that the water height in the branch A and the branch B is the same, while the water height in the branch C is slightly lower, indicating that there is unexpelled atmosphere in the branch C, and the pressure of the unexpelled atmosphere is greater than the pressure of the water in the branch A and the branch B, which is consistent with Pascal's theorem.

[0086] Example 3 The communication pipe in the preceding clause is taken, the branch A is curved and extended above the branch C, but is not connected with the branch C; the branch B is not connected with the branch A and the branch C, but is connected with another pressure gas pipe (which cannot leak). The upper end of the branch C is open, and the lower end is connected with the horizontal main pipe and is equipped with a switch, but is in a closed state, so the upper part of the branch C is also in communication with the atmosphere. At this time, it is no longer a communication pipe.

[0087] A certain pressure gas is continuously input into the branch B, and it can be seen that the water in the branch A quickly reaches above the branch C and flows into the branch C until it overflows, indicating that the pressure of the branch A is greater than that of the branch C, which is consistent with Pascal's theorem and Bernoulli's theorem - the water in the branch A obtains a longer flow path, a larger flow rate and a higher flow speed, so the pressure is less than that of the horizontal main pipe and the branch B.

[0088] Example 4 Take the communication pipe of the preceding paragraph, the branch pipe A is curved and extended to connect with the branch pipe C, the switch installed at the connection between the lower end of the branch pipe C and the horizontal main pipe is still in the closed state, and it can be seen that there is un-discharged atmosphere in the pipe diameter where the branch pipe A is connected with the branch pipe C. The branch pipe B is still connected with another pressure gas pipe.

[0089] The branch pipe B is continuously inputted with a certain pressure gas, and it can be seen that the water in the branch pipe A flows into the branch pipe C above the branch pipe C, and the residual gaseous state in the branch pipe C floats above the branch pipe C. At this time, the input of the pressure gas into the branch pipe B is stopped, and the present situation is kept. If the structural factors are excluded, the pressure in the branch pipe B is the largest at this time, the pressure in the branch pipe A is the second, and the pressure in the branch pipe C is the smallest. This is consistent with the Pascal theorem and the Bernoulli theorem - at this time, the pressure in each branch pipe is actually equal.

[0090] The switch at the connection between the lower end of the branch pipe C and the horizontal main pipe is opened, and it can be seen that the residual gas in the branch pipe C rapidly moves to the branch pipe A and stays at the high point of the curved extension part of the branch pipe A, a small part of the water in the branch pipe A and the gas in the branch pipe C have exchanged positions, and the water in the horizontal main pipe also rapidly flows into the branch pipe C and the branch pipe B, and the gas and water in the branch pipe B each occupy part of the space. It is illustrated that the residual gas in the branch pipe B and the branch pipe C and part of the water in the horizontal main pipe have also exchanged positions, and the pressure is finally balanced. This is still consistent with the Pascal theorem and the Bernoulli theorem.

[0091] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid self-circulation system with a controllable built-in valve, mainly composed of a pressure chamber, a controllable built-in valve, a built-in flow pipe, an external valve, and a return flow pipe, characterized in that: The valve core of the controllable built-in valve can perform various opening and closing movements, including linear movements that are parallel or coincident with the direction of fluid movement in the built-in flow tube, lateral lateral movements that are perpendicular to the direction of fluid movement in the built-in flow tube, oblique lateral movements that deflect a certain angle from the direction of fluid movement in the built-in flow tube, and linear or lateral lateral movements that deflect synchronously with the direction of fluid movement in the built-in flow tube.

2. The fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: The controllable built-in valve in the pressure chamber can be installed from top to bottom, with the outlet facing downwards or in another direction; the controllable built-in valve can also be installed from bottom to top, with the outlet facing upwards or in another direction.

3. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: The controllable built-in valve in the pressure chamber can be installed horizontally, with the outlet of the controllable built-in valve facing the side wall of the pressure chamber or other directions.

4. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: When necessary, a throttling orifice can be used to replace the controllable built-in valve. The throttling orifice is used to control the flow rate by limiting the cross-sectional area through which the fluid passes. The height of the throttling orifice can be slightly submerged below the liquid surface or slightly above it. Corresponding to the throttling orifice, a one-way valve can be installed to connect to the built-in flow passage, or a one-way valve can be omitted.

5. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: The controllable built-in valve can be controlled manually, electrically, or in other non-manual ways.

6. A fluid self-circulation system according to claim 1, characterized in that: Fluid can only enter the pressure chamber through the built-in flow passage and / or the controllable built-in valve.

7. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: The flow cross-sectional area of ​​the controllable built-in valve is less than or equal to, or greater than, the flow cross-sectional area of ​​the built-in flow tube.

8. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: The controllable built-in valve can be used independently or in combination with other devices.

9. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: The reflux conduit can be connected to one or more loads, and can also be connected to other devices.

10. A fluid self-circulation system with a controllable built-in valve according to claim 1, characterized in that: Installing a venturi tube on the built-in flow passage can increase the speed of fluid flow within the built-in flow passage.

11. A fluid self-circulation system with a controllable built-in valve, mainly composed of an equivalent pressure chamber, a controllable built-in valve, a built-in flow pipe, an external valve, and a return flow pipe, characterized in that: All devices installed in the pressure chamber that are connected to the built-in flow pipe and have the ability to block, open, and close the flow of fluid in a controllable manner, whether or not they have a valve core, are controllable built-in valves. They can be used independently, simultaneously, or in combination with other devices.

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